Zoning & general plan
Colusa mixes urban, rural, and agricultural designations — city limits, county zoning, and ag overlays can sit minutes apart. Confirm which planning desk controls the APN before you assume city rules apply.
California · County guide
Colusa County
Colusa County sits mainly on the Sacramento Valley floor with the Coast Ranges rising to the west. Most agricultural and town lots are nearly level; foothill parcels along the western rim introduce real slope. Paste an address or APN for a first-pass screen of zoning, land use, FEMA flood, CAL FIRE / WUI wildfire hazard, soils, slope, and geology — every line linked to the official source. Verify entitlements with Colusa County planning before you buy or build.
Useful sources for searching Colusa County: Official sources to verify buildability in Colusa County ↓
About Colusa County land & parcels
Colusa County sits mainly on the Sacramento Valley floor with the Coast Ranges rising to the west. Most agricultural and town lots are nearly level; foothill parcels along the western rim introduce real slope.
What landowners and buyers usually check
In Colusa County, buyers and landowners usually run the screens below early because Colusa County sits mainly on the Sacramento Valley floor with the Coast Ranges rising to the west. Most agricultural and town lots are nearly level; foothill parcels along the western rim introduce real slope. Elevation spans Near sea level on the valley floor to roughly 7,000+ ft in western Coast Range peaks, so two nearby APNs can need totally different diligence. Local pattern: Valley parcels are often low-slope—focus diligence on flood, drainage, and soils.
FEMA flood & drainage
Bay-edge, wetland, delta, and low-lying flats in Colusa often carry FEMA and drainage questions even when the lot looks level. Screen NFHL zones and ask about local drainage history.
CAL FIRE / WUI wildfire
Colusa has high-country timber and wildland exposure. CAL FIRE / WUI severity drives insurance, defensible space, and often design cost — screen every APN.
Parcel boundary & APN
Confirm you are looking at the correct APN and boundary against Colusa County assessor records — listings and informal maps are wrong often enough to kill deals after deposits.
Soils (SSURGO)
Bay fill, alluvium, and hillside soils in Colusa change septic, drainage, and grading feasibility. Screen SSURGO, then verify with environmental health / geotech as needed.
Slope, elevation & access
Screen slope and elevation on the APN in Parcel View, then confirm grading, driveway grades, and pad feasibility with Colusa County planning and a licensed surveyor/engineer.
Geology & seismic
Colusa buyers commonly check liquefaction, fault, and landslide screens where the state publishes them — especially on bay fill and hillside lots.
Local terrain context
Colusa spans patterns like “Flat Sacramento Valley farmland and leveed river corridors” and “Sacramento River floodplain and bypass-adjacent lowlands.” Match the APN to the right landform story — valley-floor diligence differs from ridge or canyon lots.
Housing & land patterns
Median home
$393k
Median income
$76k
Ownership
62%
Median year built
1978
vs California
-48%
Terrain
Flat Sacramento Valley farmland · Sacramento River floodplain · Western foothills
Colusa County sits mainly on the Sacramento Valley floor with the Coast Ranges rising to the west. Most agricultural and town lots are nearly level; foothill parcels along the western rim introduce real slope. Housing context: housing values well below the California ACS median, household incomes below the state average, a owner-heavy housing mix, and housing stock primarily built during the mid- to late-20th century.
Housing market
Median home value
$393k
$393,400
Much lower than CA
Median rent
$1,157/mo
Median household income
$76k
$75,672
Lower than CA
Vacancy rate
8.5%
-48% vs California ACS median
Housing characteristics
1978
19202025
Typical home age signal — not a forecast of new construction.
Affordability & housing mix
Home value ÷ income
5.2×
ACS proxy — median home value divided by median household income
Rent ÷ income
18%
Annual median gross rent as share of median household income
Rent burden 30%+
35%
Share of renter households paying 30% or more of income on gross rent
Derived ACS ratios for market context — not a proprietary cost-of-living index or lender qualification standard.
Units-in-structure mix from ACS — shares of total housing units, not new construction pipeline.
Lifestyle & investment
Families
- Income levels vary — confirm school and commute fit locally
- Neighborhood amenities and lot hazards still decide fit
- Confirm attendance boundaries on the specific APN
Retirees
- Housing stock centered around 1978 — maintenance needs vary
- Walkability and healthcare access differ street to street
- Review HOA rules, insurance, and parcel hazards before buying
Investors
- Owner-heavy markets still need local rental comps
- ACS median gross rent about $1,157/mo
- Zoning, ADU rules, and insurance drive outcomes more than ACS averages
Builders
- Valley parcels are often low-slope—focus diligence on flood, drainage, and soils
- Verify zoning, setbacks, and utility access early
- Geotechnical and grading reviews are common on hillside lots
Terrain & geography
Colusa County sits mainly on the Sacramento Valley floor with the Coast Ranges rising to the west. Most agricultural and town lots are nearly level; foothill parcels along the western rim introduce real slope.
Elevation Near sea level on the valley floor to roughly 7,000+ ft in western Coast Range peaks
01Flat Sacramento Valley farmlandFlat Sacramento Valley farmland and leveed river corridors
02Sacramento River floodplainSacramento River floodplain and bypass-adjacent lowlands
03Western foothillsWestern foothills and Coast Range slopes
04Seasonal wetlandsSeasonal wetlands and rice-country flats
Development checklist
- Slope and grading feasibility
- Flood exposure and drainage
- Wildfire / WUI hazard
- Liquefaction and geology where mapped
- Zoning, setbacks, and overlays
- Utility access (water, sewer/septic, power)
- Geotechnical conditions on hillside or fill lots
Screen slope and elevation on the APN in Parcel View, then confirm grading, driveway grades, and pad feasibility with Colusa County planning and a licensed surveyor/engineer.
Key takeaways
- Housing prices in Colusa County run below the California ACS median.
- Terrain shifts across several landscapes — from flat sacramento valley farmland to seasonal wetlands.
- Parcel-specific screening for zoning, flood, wildfire, soils, and slope matters more than any countywide average.
Public GIS, assessor records, and Colusa County planning information help buyers, investors, REALTORS®, and developers evaluate parcels before calling the planner.
What Parcel View checks in Colusa County
🏛 Zoning & general plan
Reference zoning district and general plan land use from statewide LCI layers and Colusa County planning data, so you can see how a lot is designated before you call the planner.
🌊 FEMA flood
FEMA National Flood Hazard Layer zones across the parcel, flagging Special Flood Hazard Areas that drive insurance and building requirements.
🔥 Wildfire hazard
CAL FIRE Fire Hazard Severity Zones and WUI context — critical across much of Colusa County for insurance and defensible-space rules.
🌳 Soils
USDA SSURGO soil map units for a first look at septic suitability, drainage, and grading constraints.
⛰ Slope & topography
Screen slope and elevation on the APN in Parcel View, then confirm grading, driveway grades, and pad feasibility with Colusa County planning and a licensed surveyor/engineer.
🪨 Geology & seismic
Mapped liquefaction, fault, and landslide layers where the state publishes them.
Colusa County hazard & zoning screens
Official Colusa County sources
Parcel View reads public GIS — it does not replace the county. Every screening links to the controlling source, and these are the authorities for Colusa County:
- Colusa County Planning Department ↗ — zoning, general plan, and permit rules that control any screening result.
- Colusa County Assessor ↗ — parcel numbers, ownership, and lot records.
- FEMA National Flood Hazard Layer ↗ — official flood zones and base flood elevations.
- CAL FIRE Fire Hazard Severity Zones ↗ — state wildfire hazard mapping.
- USDA NRCS Web Soil Survey ↗ — SSURGO soils for septic and grading feasibility.
People also ask about Colusa County parcels
How do I check zoning on a Colusa County parcel?
Screen the APN in Parcel View for a first-pass zoning/general-plan reference, then confirm the controlling district with Colusa County planning. Overlays and specific plans can change what is allowed.
How do I check FEMA flood zones in Colusa County?
Parcel View intersects the FEMA National Flood Hazard Layer with the parcel polygon. Verify Special Flood Hazard Areas and base flood elevations on the FEMA Map Service Center before financing or building.
How do I check wildfire hazard in Colusa County?
Review CAL FIRE Fire Hazard Severity Zone context on the Parcel View screen, then confirm adopted maps with OSFM/CAL FIRE and ask Colusa County planning how FHSZ or WUI rules affect your project.
Can Parcel View tell me if Colusa County land is buildable?
No single map says “buildable.” Use Parcel View to flag zoning, flood, fire, soils, and geology constraints, then verify entitlements with Colusa County planning and licensed professionals.